Using a proxy with firefox
If you want to use an anonymizing proxy like Tor with firefox, you’re not going to want to use it all the time. Bouncing your traffic around takes a long time, and it will hurt your performance as a tradeoff. While you can set an individual proxy setting to not be applied for certain sites, this is generally a pain to manage.
It’s much easier with the SwitchProxy extension, which lets you set up multiple proxy profiles, and change proxy settings from the toolbar instead of going through the options dialog.
https://addons.update.mozilla.org/extensions/moreinfo.php?application=firefox&id=125
